[flexcoders] DataGrid, error using DateField as the item editor

[Cosma]

Hello,

I'm trying to create an editable DataGrid using Flex 2.0.1. One of the
columns is of Date type, so I want to use a DateField as the item editor.

The problem is that I'm getting an error when the focus is taken away
from the DateField:

  TypeError: Error #1034: Assegnazione di tipo forzata non riuscita:
  impossibile convertire "01/10/1980" in Date.
        at mx.controls::DataGrid/::itemEditorItemEditEndHandler()

It seems that the DataGrid is trying to assign back the raw string
value into my data provider object.

This is a code snippet that reproduce the problem:

<mx:Script>
  <![CDATA[
    [Bindable]
    private var rows:ArrayCollection = new ArrayCollection();
    private function init():void {
      // called on creationComplete
      var testRow:PersonVO = new PersonVO();
      testRow.name = "Name";
      testRow.surname = "Surname";
      testRow.birthDate = new Date(1980, 9, 1);
      rows.addItem(testRow);
    }
  ]]>
</mx:Script>
<mx:DataGrid dataProvider="{rows}" editable="true">
  <mx:columns>
    <mx:DataGridColumn dataField="name"/>
    <mx:DataGridColumn dataField="surname"/>
    <mx:DataGridColumn dataField="birthDate">
      <mx:itemEditor>
        <mx:Component>
          <mx:DateField formatString="DD/MM/YYYY"/>
        </mx:Component>
      </mx:itemEditor>
    </mx:DataGridColumn>
  </mx:columns>
</mx:DataGrid>


Do you have any idea of the cause of this behaviour?

Thanks
Cosma